operation being called off. Viribus Unitis was also sunk prior to the end of the war on 1 November 1918 when a team of Italian frogmen sank the battleship with mines while she was moored at port in Pula. Following Austria-Hungary's defeat in World War I, the remaining two battleships of the class were handed over to the Allies with the Tegetthoff being given to Italy and scrapped in 1924 and Prinz Eugen being handed over to France and sunk as a target ship in 1922. Ersatz Monarch class The Ersatz Monarch class (literally Replacement Monarch class) was a projected series of four battleships that would have been constructed for the Austro-Hungarian Navy between 1914 and 1919. They were essentially an enlarged version of the Tegetthoff class and were meant to replace the aging s. Due to World War I, none were laid down and all four were eventually canceled in late 1917. There were supposed to be four battleships in the class (named "Battleship VIII" to "Battleship XI"). While the battleships were never laid down, four of the main guns were constructed and later transferred to the Austro-Hungarian Army for use on the Italian Front. See also List of battleships List of ironclad warships of Austria-Hungary List of cruisers of Austria-Hungary List of ships of Austria-Hungary Notes Footnotes Citations References Austria-Hungary Austria-Hungary Battleships